diff --git a/services/commtest/Cargo.lock b/services/commtest/Cargo.lock
--- a/services/commtest/Cargo.lock
+++ b/services/commtest/Cargo.lock
@@ -42,13 +42,13 @@
 
 [[package]]
 name = "async-trait"
-version = "0.1.60"
+version = "0.1.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "677d1d8ab452a3936018a687b20e6f7cf5363d713b732b8884001317b0e48aa3"
+checksum = "bc00ceb34980c03614e35a3a4e218276a0a824e911d07651cd0d858a51e8c0f0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.107",
+ "syn 2.0.29",
 ]
 
 [[package]]
@@ -59,9 +59,9 @@
 
 [[package]]
 name = "axum"
-version = "0.6.1"
+version = "0.6.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08b108ad2665fa3f6e6a517c3d80ec3e77d224c47d605167aefaa5d7ef97fa48"
+checksum = "3b829e4e32b91e643de6eafe82b1d90675f5874230191a4ffbc1b336dec4d6bf"
 dependencies = [
  "async-trait",
  "axum-core",
@@ -81,16 +81,15 @@
  "serde",
  "sync_wrapper",
  "tower",
- "tower-http",
  "tower-layer",
  "tower-service",
 ]
 
 [[package]]
 name = "axum-core"
-version = "0.3.0"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79b8558f5a0581152dc94dcd289132a1d377494bdeafcd41869b3258e3e2ad92"
+checksum = "759fa577a247914fd3f7f76d62972792636412fbfd634cd452f6a385a74d2d2c"
 dependencies = [
  "async-trait",
  "bytes",
@@ -217,6 +216,7 @@
  "derive_more",
  "futures",
  "futures-util",
+ "grpc_clients",
  "hex",
  "lazy_static",
  "num_cpus",
@@ -230,7 +230,7 @@
  "tokio",
  "tokio-tungstenite",
  "tonic 0.8.3",
- "tonic-build",
+ "tonic-build 0.8.4",
  "tunnelbroker_messages",
  "url",
 ]
@@ -368,7 +368,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
 ]
 
 [[package]]
@@ -489,7 +489,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
 ]
 
 [[package]]
@@ -552,6 +552,18 @@
  "subtle",
 ]
 
+[[package]]
+name = "grpc_clients"
+version = "0.1.0"
+dependencies = [
+ "derive_more",
+ "prost",
+ "tonic 0.9.2",
+ "tonic-build 0.9.2",
+ "tracing",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "h2"
 version = "0.3.17"
@@ -618,9 +630,9 @@
 
 [[package]]
 name = "http"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
+checksum = "bd6effc99afb63425aff9b05836f029929e345a6148a14b7ecd5ab67af944482"
 dependencies = [
  "bytes",
  "fnv",
@@ -638,12 +650,6 @@
  "pin-project-lite",
 ]
 
-[[package]]
-name = "http-range-header"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bfe8eed0a9285ef776bb792479ea3834e8b94e13d615c2f66d03dd50a435a29"
-
 [[package]]
 name = "httparse"
 version = "1.8.0"
@@ -658,9 +664,9 @@
 
 [[package]]
 name = "hyper"
-version = "0.14.23"
+version = "0.14.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "034711faac9d2166cb1baf1a2fb0b60b1f277f8492fd72176c17f3515e1abd3c"
+checksum = "ffb1cfd654a8219eaef89881fdb3bb3b1cdc5fa75ded05d6933b2b382e395468"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -785,6 +791,15 @@
  "cfg-if",
 ]
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "matchit"
 version = "0.7.0"
@@ -849,6 +864,16 @@
  "tempfile",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.14.0"
@@ -931,6 +956,12 @@
  "vcpkg",
 ]
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "password-hash"
 version = "0.4.2"
@@ -1014,18 +1045,18 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.56"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
+checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "prost"
-version = "0.11.3"
+version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0b18e655c21ff5ac2084a5ad0611e827b3f92badf79f4910b5a5c58f4d87ff0"
+checksum = "0b82eaa1d779e9a4bc1c3217db8ffbeabaae1dca241bf70183242128d48681cd"
 dependencies = [
  "bytes",
  "prost-derive",
@@ -1033,9 +1064,9 @@
 
 [[package]]
 name = "prost-build"
-version = "0.11.4"
+version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "276470f7f281b0ed53d2ae42dd52b4a8d08853a3c70e7fe95882acbb98a6ae94"
+checksum = "119533552c9a7ffacc21e099c24a0ac8bb19c2a2a3f363de84cd9b844feab270"
 dependencies = [
  "bytes",
  "heck",
@@ -1055,9 +1086,9 @@
 
 [[package]]
 name = "prost-derive"
-version = "0.11.2"
+version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "164ae68b6587001ca506d3bf7f1000bfa248d0e1217b618108fba4ec1d0cc306"
+checksum = "e5d2d8d10f3c6ded6da8b05b5fb3b8a5082514344d56c9f871412d29b4e075b4"
 dependencies = [
  "anyhow",
  "itertools",
@@ -1068,19 +1099,18 @@
 
 [[package]]
 name = "prost-types"
-version = "0.11.2"
+version = "0.11.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "747761bc3dc48f9a34553bf65605cf6cb6288ba219f3450b4275dbd81539551a"
+checksum = "213622a1460818959ac1181aaeb2dc9c7f63df720db7d788b3e24eacd1983e13"
 dependencies = [
- "bytes",
  "prost",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.26"
+version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
 dependencies = [
  "proc-macro2",
 ]
@@ -1133,6 +1163,15 @@
  "regex-syntax",
 ]
 
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax",
+]
+
 [[package]]
 name = "regex-syntax"
 version = "0.6.28"
@@ -1186,6 +1225,21 @@
  "winreg",
 ]
 
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -1195,6 +1249,37 @@
  "semver",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.21.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd8d6c9f025a446bc4d18ad9632e69aec8f287aa84499ee335599fabd20c3fd8"
+dependencies = [
+ "log",
+ "ring",
+ "rustls-webpki",
+ "sct",
+]
+
+[[package]]
+name = "rustls-pemfile"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d3987094b1d07b653b7dfdc3f70ce9a1da9c51ac18c1b06b662e4f9a0e9f4b2"
+dependencies = [
+ "base64 0.21.2",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.101.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d93931baf2d282fff8d3a532bbfd7653f734643161b87e3e01e59a04439bf0d"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.11"
@@ -1216,6 +1301,16 @@
  "windows-sys",
 ]
 
+[[package]]
+name = "sct"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d53dcdb7c9f8158937a7981b48accfd39a43af418591a5d008c7b22b5e1b7ca4"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "sec1"
 version = "0.3.0"
@@ -1275,7 +1370,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
 ]
 
 [[package]]
@@ -1323,6 +1418,15 @@
  "digest 0.10.7",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "900fba806f70c630b0a382d0d825e17a0f19fcd059a2ade1ff237bcddf446b31"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.7"
@@ -1332,6 +1436,12 @@
  "autocfg",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb4feee49fdd9f707ef802e22365a35de4b7b299de4763d44bfea899442ff9"
+
 [[package]]
 name = "socket2"
 version = "0.4.7"
@@ -1342,6 +1452,12 @@
  "winapi",
 ]
 
+[[package]]
+name = "spin"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+
 [[package]]
 name = "subtle"
 version = "2.5.0"
@@ -1361,9 +1477,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.15"
+version = "2.0.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
+checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1407,7 +1523,17 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+dependencies = [
+ "cfg-if",
+ "once_cell",
 ]
 
 [[package]]
@@ -1474,6 +1600,16 @@
  "tokio",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c28327cf380ac148141087fbfb9de9d7bd4e84ab5d2c28fbc911d753de8a7081"
+dependencies = [
+ "rustls",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-stream"
 version = "0.1.11"
@@ -1549,15 +1685,26 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3082666a3a6433f7f511c7192923fa1fe07c69332d3c6a2e6bb040b569199d5a"
 dependencies = [
+ "async-stream",
+ "async-trait",
+ "axum",
  "base64 0.21.2",
  "bytes",
  "futures-core",
  "futures-util",
+ "h2",
  "http",
  "http-body",
+ "hyper",
+ "hyper-timeout",
  "percent-encoding",
  "pin-project",
+ "prost",
+ "rustls-pemfile",
+ "tokio",
+ "tokio-rustls",
  "tokio-stream",
+ "tower",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -1576,6 +1723,19 @@
  "syn 1.0.107",
 ]
 
+[[package]]
+name = "tonic-build"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6fdaae4c2c638bb70fe42803a26fbd6fc6ac8c72f5c59f67ecc2a2dcabf4b07"
+dependencies = [
+ "prettyplease",
+ "proc-macro2",
+ "prost-build",
+ "quote",
+ "syn 1.0.107",
+]
+
 [[package]]
 name = "tower"
 version = "0.4.13"
@@ -1596,25 +1756,6 @@
  "tracing",
 ]
 
-[[package]]
-name = "tower-http"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f873044bf02dd1e8239e9c1293ea39dad76dc594ec16185d0a1bf31d8dc8d858"
-dependencies = [
- "bitflags",
- "bytes",
- "futures-core",
- "futures-util",
- "http",
- "http-body",
- "http-range-header",
- "pin-project-lite",
- "tower",
- "tower-layer",
- "tower-service",
-]
-
 [[package]]
 name = "tower-layer"
 version = "0.3.2"
@@ -1634,7 +1775,6 @@
 checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
 dependencies = [
  "cfg-if",
- "log",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
@@ -1658,6 +1798,7 @@
 checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
 dependencies = [
  "once_cell",
+ "valuable",
 ]
 
 [[package]]
@@ -1670,6 +1811,35 @@
  "tracing",
 ]
 
+[[package]]
+name = "tracing-log"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ddad33d2d10b1ed7eb9d1f518a5674713876e97e5bb9b7345a7984fbb4f922"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30a651bc37f915e81f087d86e62a18eec5f79550c7faff886f7090b4ea757c77"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
 [[package]]
 name = "try-lock"
 version = "0.2.3"
@@ -1739,6 +1909,12 @@
  "tinyvec",
 ]
 
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
 [[package]]
 name = "url"
 version = "2.3.1"
@@ -1756,6 +1932,12 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
 
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -1824,7 +2006,7 @@
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
  "wasm-bindgen-shared",
 ]
 
@@ -1858,7 +2040,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -1995,5 +2177,5 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.29",
 ]
diff --git a/services/commtest/Cargo.toml b/services/commtest/Cargo.toml
--- a/services/commtest/Cargo.toml
+++ b/services/commtest/Cargo.toml
@@ -6,6 +6,7 @@
 
 [dependencies]
 comm-opaque2 = { path = "../../shared/comm-opaque2" }
+grpc_clients = { path = "../../shared/grpc_clients" }
 tonic = "0.8"
 tokio = { version = "1.24", features = ["macros", "rt-multi-thread"] }
 prost = "0.11"
diff --git a/services/commtest/tests/grpc_client_test.rs b/services/commtest/tests/grpc_client_test.rs
new file mode 100644
--- /dev/null
+++ b/services/commtest/tests/grpc_client_test.rs
@@ -0,0 +1,30 @@
+use commtest::identity::device::create_device;
+
+#[tokio::test]
+async fn verify_access_token() {
+  use grpc_clients::identity::unauthenticated::client::verify_user_access_token;
+  let device_info = create_device().await;
+
+  let token_valid = verify_user_access_token(
+    "http://127.0.0.1:50054",
+    &device_info.user_id,
+    &device_info.device_id,
+    &device_info.access_token,
+  )
+  .await
+  .expect("Failed to call identity's verify_user_access_token endpoint");
+
+  assert_eq!(token_valid, true);
+
+  // Try again with invalid access token
+  let token_valid = verify_user_access_token(
+    "http://127.0.0.1:50054",
+    &device_info.user_id,
+    &device_info.device_id,
+    "garbage",
+  )
+  .await
+  .expect("Failed to call identity's verify_user_access_token endpoint");
+
+  assert_eq!(token_valid, false);
+}
diff --git a/shared/grpc_clients/src/error.rs b/shared/grpc_clients/src/error.rs
--- a/shared/grpc_clients/src/error.rs
+++ b/shared/grpc_clients/src/error.rs
@@ -1,4 +1,4 @@
-use tonic::codegen::http::uri::InvalidUri;
+use tonic::{codegen::http::uri::InvalidUri, Status};
 
 #[derive(
   Debug, derive_more::Display, derive_more::From, derive_more::Error,
@@ -8,4 +8,6 @@
   TransportError(tonic::transport::Error),
   #[display(...)]
   InvalidUri(InvalidUri),
+  #[display(...)]
+  GrpcStatus(Status),
 }
diff --git a/shared/grpc_clients/src/identity/unauthenticated/client.rs b/shared/grpc_clients/src/identity/unauthenticated/client.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/identity/unauthenticated/client.rs
@@ -0,0 +1,27 @@
+/// This file is meant to contain commonly used RPC calls
+use crate::error::Error;
+
+use super::get_unauthenticated_client;
+use crate::identity::protos::unauthenticated::VerifyUserAccessTokenRequest;
+
+use tonic::Request;
+
+/// Returns true if access token is valid
+pub async fn verify_user_access_token(
+  identity_url: &str,
+  user_id: &str,
+  device_id: &str,
+  access_token: &str,
+) -> Result<bool, Error> {
+  let mut grpc_client = get_unauthenticated_client(identity_url).await?;
+
+  let message = VerifyUserAccessTokenRequest {
+    user_id: user_id.to_string(),
+    signing_public_key: device_id.to_string(),
+    access_token: access_token.to_string(),
+  };
+
+  let request = Request::new(message);
+  let response = grpc_client.verify_user_access_token(request).await?;
+  return Ok(response.into_inner().token_valid);
+}
diff --git a/shared/grpc_clients/src/identity/unauthenticated.rs b/shared/grpc_clients/src/identity/unauthenticated/mod.rs
rename from shared/grpc_clients/src/identity/unauthenticated.rs
rename to shared/grpc_clients/src/identity/unauthenticated/mod.rs
--- a/shared/grpc_clients/src/identity/unauthenticated.rs
+++ b/shared/grpc_clients/src/identity/unauthenticated/mod.rs
@@ -1,3 +1,5 @@
+pub mod client;
+
 use tonic::transport::Channel;
 
 use super::protos::client::identity_client_service_client::IdentityClientServiceClient;